Abstract: The subject of research in this article is the norms of substantive law that characterize such a special segment of civil law relations as insignificant transactions, as well as law enforcement practice for their conclusion and implementation within the framework of modern economic turnover. The author in the article analyzes the legislative construction of the concept of an insignificant transaction, talks about its "defects". The problem is also aggravated by the lack of unity of views on its explanation in the scientific community, which necessitates a separate study focusing exclusively on the definitive apparatus. The problematic field of Russian legislation is also the basic signs (criteria) themselves that determine the invalidity of insignificant transactions within the framework of civil turnover, which the author pays special attention to in view of their multifaceted practical significance, which determines such basic legal parameters as "public interests", "interests of third parties", legal inefficiency. To conduct the research, the author used a methodology that includes an analytical review of regulatory legal and scientific literature on the subject of research, synthesis and generalization of the collected data, formation of optimal parameters of the model for determining the nullity of a transaction within the framework of modern civil law. The result of the work is the original author's proposals and recommendations of the legislative "revision" of civil legislation, forming innovations in law. In particular, in the form of draft articles, an updated definition of an insignificant transaction is proposed, their specific types and characteristic features are isolated. The author's concept of public interests is formulated. In their entirety, the components of the novelty of the article.